But if you double the width of the boards, the distance the joists can span increases ... The weight of the building materials (joists, subfloor, flooring, and ceiling) is known as the .... The tongue and groove wood flooring is nailed to the joists.

Feb 15, 2011 ... IRC Table R803.1 lists 1 1/2" T&G for rafter spans up to 72". ... One way it to put plywood or OSB sheathing on top of hte decking. .... We just did a heavy timber patio cover with 2x6 t&g roof decking and the engineer called for...

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